<template>
  <view>
    <view class="search-box">
      <uni-search-bar @confirm="search" @input="input" :radius="100" cancelButton="none"></uni-search-bar>
    </view>

    <!--  搜索建议列表  -->
    <view class="sugg-list">
      <view class="sugg-item" v-for="(item,i) in searchResults":key="i">
        <view class="specialty-name" >{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    
    <!--  搜索历史  -->
    <view class="history-box">
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item,i) in historyList" :key="i"></uni-tag>
      </view>
    </view>
    
  </view>

</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        //搜索的结果列表
        kw: "",
        searchResults: [],
        //搜索历史的数组
        historyList:[]
      };
    },
    onLoad(){
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods: {
      //input 输入事件的处理函数
      input(e) {

        clearTimeout(this.timer)

        this.timer = setTimeout(() => {
          this.kw = e
          this.getSearchList()
        }, 500)
      },
      async getSearchList() {
        // 判断搜索关键词是否为空
        if (this.kw.length === 0) {
          this.searchResults = []
        }

          const {  data: res  } = await uni.$http.get('/api/public/v1/goods/qsearch', { query : this.kw})
          if (res.meta.status !== 200) return uni.$showMsg(null)
          this.searchResults = res.message
          
          this.saveSearchHistory()
      },
      saveSearchHistory(){
        //将最新的搜索历史放在开头
        this.historyList.unshift(this.kw)
        //不重复添加搜索历史
        this.historyList = [... new Set([...this.historyList,this.kw])]
        
        //对搜索历史数据，进行持久化的存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))

      },
      clean(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      }
    }
  }
</script>

<style lang="scss">
  .search-box {
    position: sticky;
    top: 0;
    z-index: 999;
  }
  
  
  .sugg-list{
    padding: 0 5px;
    
    .sugg-item{
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size:12px;
      padding: 13px 0;
      border-bottom: 1px solid #efefef;
      
      .specialty-name{
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }
    }
  }  
  
  
    .history-box{
      padding: 0 5px;
      
      .history-title{
        display: flex;
        justify-content: space-between;
        height: 40px;
        align-items: center;
        font-size: 13px;
        border-bottom: 1px solid #efefef;
      }
      
      .history-list{
        display: flex;
        flex-wrap: wrap;
        
        .uni-tag{
          margin-top: 5px;
          margin-right: 5px;
        }
      }
    }
  
</style>
